U boat classico 45 ab4 2 5569 this new generation u boat sports a dual layer face the matt black cut out has been laid over a carbon fibre dial over which the embossed numerals have been placed the movement has been rebuilt inside out to allow the crown to be on the left a feature that opens up the wearers wrist movements it has also been positioned so that drilling through the face at 6 oclock reveals a ruby classic 45 ab4 2 dial in carbon fibre and elevated numerals and strap in stitch